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Groups > comp.lang.python > #92139
| References | <pan.2015.06.05.12.46.21@nowhere.invalid> |
|---|---|
| Date | 2015-06-05 08:55 -0400 |
| Subject | Re: So what's happening here? |
| From | Larry Martell <larry.martell@gmail.com> |
| Newsgroups | comp.lang.python |
| Message-ID | <mailman.195.1433508911.13271.python-list@python.org> (permalink) |
On Fri, Jun 5, 2015 at 8:46 AM, Paul Appleby <pap@nowhere.invalid> wrote: > I saw somewhere on the net that you can copy a list with slicing. So > what's happening when I try it with a numpy array? > >>>> a = numpy.array([1,2,3]) >>>> b = a[:] >>>> a is b > False >>>> b[1] = 9 >>>> a > array([1, 9, 3]) is is identity testing, == is equality testing >>> a = numpy.array([1,2,3]) >>> b = a[:] >>> a == b array([ True, True, True], dtype=bool) >>> id(a) 4510409872 >>> id(b) 4510410192
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So what's happening here? Paul Appleby <pap@nowhere.invalid> - 2015-06-05 12:46 +0000
Re: So what's happening here? Fabien <fabien.maussion@gmail.com> - 2015-06-05 14:52 +0200
Re: So what's happening here? Larry Martell <larry.martell@gmail.com> - 2015-06-05 08:55 -0400
Re: So what's happening here? Peter Otten <__peter__@web.de> - 2015-06-05 15:09 +0200
Re: So what's happening here? Paul Appleby <pap@nowhere.invalid> - 2015-06-05 13:11 +0000
Re: So what's happening here? Gary Herron <gary.herron@islandtraining.com> - 2015-06-05 06:23 -0700
Re: So what's happening here? Steven D'Aprano <steve@pearwood.info> - 2015-06-05 23:51 +1000
Re: So what's happening here? Nobody <nobody@nowhere.invalid> - 2015-06-05 15:13 +0100
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